Data communications principles
Data communications principles
Self-similarity in World Wide Web traffic: evidence and possible causes
IEEE/ACM Transactions on Networking (TON)
Time synchronization in ad hoc networks
MobiHoc '01 Proceedings of the 2nd ACM international symposium on Mobile ad hoc networking & computing
Principles of Wireless Networks: A Unified Approach
Principles of Wireless Networks: A Unified Approach
Internal synchronization of drift-constraint clocks in ad-hoc sensor networks
Proceedings of the 5th ACM international symposium on Mobile ad hoc networking and computing
Proceedings of the 5th ACM international symposium on Mobile ad hoc networking and computing
Theory, Volume 1, Queueing Systems
Theory, Volume 1, Queueing Systems
Radio resource sharing for ad hoc networking with UWB
IEEE Journal on Selected Areas in Communications
Optimal power control, scheduling, and routing in UWB networks
IEEE Journal on Selected Areas in Communications
Scheduling and power control for MAC layer design in multihop IR-UWB networks
International Journal of Network Management
Location-aided medium access control for low data rate UWB wireless sensor networks
Wireless Communications & Mobile Computing
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We propose a MAC protocol for use in multihop wireless networks that deploy an underlying UWB (Ultra Wide Band)-based physical layer. We consider a multiband approach to better utilize the available spectrum, where each transmitter sends longer pulses in one of many narrower frequency bands. The motivation comes from the observation that, in the absence of a sophisticated equalizer, the size of a slot for transmitting a UWB pulse is typically dictated by the delay spread of the channel. Therefore, using a wider frequency band to shorten the transmission time for each pulse does not increase the data rate in proportion to the available bandwidth. Our approach allows data transmissions to be contiguous and practically interference free, and, thus, highly efficient. For practicality, we ensure the conformance of our approach to FCC-imposed emission limits. We evaluate our approach via extensive simulations, and our results demonstrate the significant advantages of our approach over single-band solutions: The throughput increases significantly and the number of collisions decreases considerably. Finally, we analyze the behavior of our MAC protocol in a single-hop setting in terms of its efficiency in utilizing the multiple bands.